Re: futexes: Still infinite loop in get_futex_key() in 2.6.31-rc4

Eric Dumazet
2009-07-29T10:29:13Z

Jens Rosenboom a écrit :
> On Wed, 2009-07-29 at 08:22 +0200, Jens Rosenboom wrote:
>> On Mon, 2009-07-27 at 15:36 +0200, Peter Zijlstra wrote:
>> [...]
>>> Bugger.. how easy it is to reproduce?
>> Okay, my colleague found the right combination of scripts, take the two
>> attached, run them both a couple of times in parallel for some hours,
>> and get a stuck ps. This happens both on an old 2.6.29.1 I happened to
>> still have on one machine as with 2.6.31-rc4. Both of them dual-core
>> Opterons as the original one. If you want further tracebacks or other
>> information, let me know.
>
> Forget about null.pl even, just run pees.pl twice and a top to watch it,
> has worked for me within less than an hour several times now.
>

Ah that makes sense now...

maybe execve() forgets to clear clear_child_tid